Tool-rest for watchmakers&#39; lathes.



F. W. DBRBYSHIRB. `TOOL REST FOR WATCHMAKBRS LATHES.

APPLICATION FILED MAY-25, 1909.

' 936,422. Patented 001;. 12,1909.

Wij-[#55555: HBK/ENTE@ .,N'w f f um@ UNITED STATES PATEN T FFICE.

FREDERICK W. DERBYSHIRE, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO'AMERI-CAN WATCH TOOL COMPANY, OF IVALTHAM, MASSACHUSETTS, A CORPORATION'OFMASSACHUSETTS.

TOOL-REST FOR WATCHMAKERS LATI-IES.

Specification of Letters Patent.

Patented Oct. 12, 1909.

Application led May 25, 1909. Serial No. 498,174.

To all whom fit may concern:

Be it known that I, F nnnnnici; IV. DERBY- SHIRE, a citizen of theUnited States, and a resident of IValthain, in the county of Middlesexand State of Massachusetts, have invented a new and useful Improvementin Tool-Rests for lWatchmakei-s Lathes, of which the following is aspecication.

My invention relates to tool-rests for watch-makers lathes and itsobject is to produce a tool-rest which may be quickly adjusted andfirmly locked in position in its supporting stud in the mannerhereinafter more fully set forth.

My invention will be described in connection with the drawings whichaccompany and form a part of this speciication and which illustrate thepreferred form of my invention.

In the drawings, Figure l is a plan view of my improved tool-rest, Fig.2 is a sideV view, Fig. 3 is an end view, Fig. 4 is a longitudinalsection, Fig. 5 is a cross-section taken on the line 55 of Fig. 4, andFig. 6 is a cross-section taken on the line 6 6 of Fig. 4.

In the drawings 1 represents the usual sliding base provided with atip-over 2 pivoted thereto by the screws 3 3. The tip-over is bored toreceive the hollow stud 4 which is slotted transversely at 5 5 andlongitudi nally at (3 to provide the integral tongue 7. The post S ofthe tee 9 is arranged in the stud. The sleeve 10 provided with theactuating lever l1 surrounds the stud, and the binding roll l2 which isdisposed in a longitudinal groove 13 in the stud contacts the inner wallof said sleeve. To increase the elasticity of the tongue, the wall ofthe stud may be reduced as shown at 14 at a point opposite thelongitudinal slot 6.

It will be apparent in View of the fore-- going that the sleeve may beturned to the left by means of the actuating lever ll without binding orlocking the post 8 in the stud and that when the tool-rest has beenadjusted to the desired position, a very slight movement of the sleeveto the right will cause the tongue to securely bind and thereby lock thepost in the stud because the bottom of said groove is inclined withrespect to the inner wall of the sleeve l0 as shown most clearly in Fig.5.

One of the advantages of my invention over locking devices for toolposts heretofore employed is that the post may be locked from anyposition of the lever so that the latter may always be so placed as notto interfere with the operator.

It will be apparent that modiiications may be made by those skilled inthe art in the apparatus hereinbefore particularly described withoutdeparting from the spirit of my invention.

I claim:

1. In combination, a hollow stud provided with an integral tongue, atool-rest arranged in said stud, a sleeve around said stud, an actuatinglever secured to said sleeve, and a binding roll disposed in alongitudinal groove in said tongue and contacting with the inner wall ofsaid sleeve, the bottom of said groove being inclined with respect tosaid inner wall.

2. In combination, a hollow stud slotted longitudinally and transverselyto form a tongue, a tool-rest arranged in said stud, a sleeve aroundsaid stud, an actuating lever secured to said sleeve, and a binding rolldisposed in a longitudinal groove in said tongue and contacting with theinner wall of said sleeve, the bottom of said groove being inclined withrespect to said inner wall.

3. In combination, a hollow stud slotted longitudinally and transverselyto form a vtongue and having its wall reduced at a point opposite thelongitudinal slot therein, a tool rest arranged in said stud, a sleevearound said stud, an actuating lever secured to said sleeve, and abinding roll disposed in a longitudinal groove in said tongue andcontacting with the inner wall of said sleeve, the bottom of said groovebeing inclined with respect to said inner wall.

In testimony whereof, I have hereunto subscribed my name this 24th dayof May, 1909.

FREDERICK W. DERBYSHIRE.

IVitnesses:

E. B. ToMLrNsoN, Gno. K. WooDwoRrH.

